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0001 // SPDX-License-Identifier: GPL-2.0
0002 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
0003  *
0004  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
0005  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
0006  *
0007  * These routines maintain argument size conversion between 32bit and 64bit
0008  * environment.
0009  */
0010 
0011 #include <linux/kernel.h>
0012 #include <linux/sched.h>
0013 #include <linux/capability.h>
0014 #include <linux/fs.h> 
0015 #include <linux/mm.h> 
0016 #include <linux/file.h> 
0017 #include <linux/signal.h>
0018 #include <linux/resource.h>
0019 #include <linux/times.h>
0020 #include <linux/smp.h>
0021 #include <linux/sem.h>
0022 #include <linux/msg.h>
0023 #include <linux/shm.h>
0024 #include <linux/uio.h>
0025 #include <linux/quota.h>
0026 #include <linux/poll.h>
0027 #include <linux/personality.h>
0028 #include <linux/stat.h>
0029 #include <linux/filter.h>
0030 #include <linux/highmem.h>
0031 #include <linux/highuid.h>
0032 #include <linux/mman.h>
0033 #include <linux/ipv6.h>
0034 #include <linux/in.h>
0035 #include <linux/icmpv6.h>
0036 #include <linux/syscalls.h>
0037 #include <linux/sysctl.h>
0038 #include <linux/binfmts.h>
0039 #include <linux/dnotify.h>
0040 #include <linux/security.h>
0041 #include <linux/compat.h>
0042 #include <linux/vfs.h>
0043 #include <linux/ptrace.h>
0044 #include <linux/slab.h>
0045 
0046 #include <asm/types.h>
0047 #include <linux/uaccess.h>
0048 #include <asm/fpumacro.h>
0049 #include <asm/mmu_context.h>
0050 #include <asm/compat_signal.h>
0051 
0052 #include "systbls.h"
0053 
0054 COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, path, u32, high, u32, low)
0055 {
0056     return ksys_truncate(path, ((u64)high << 32) | low);
0057 }
0058 
0059 COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd, u32, high, u32, low)
0060 {
0061     return ksys_ftruncate(fd, ((u64)high << 32) | low);
0062 }
0063 
0064 static int cp_compat_stat64(struct kstat *stat,
0065                 struct compat_stat64 __user *statbuf)
0066 {
0067     int err;
0068 
0069     err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
0070     err |= put_user(stat->ino, &statbuf->st_ino);
0071     err |= put_user(stat->mode, &statbuf->st_mode);
0072     err |= put_user(stat->nlink, &statbuf->st_nlink);
0073     err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
0074     err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
0075     err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
0076     err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
0077     err |= put_user(stat->size, &statbuf->st_size);
0078     err |= put_user(stat->blksize, &statbuf->st_blksize);
0079     err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
0080     err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
0081     err |= put_user(stat->blocks, &statbuf->st_blocks);
0082     err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
0083     err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
0084     err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
0085     err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
0086     err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
0087     err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
0088     err |= put_user(0, &statbuf->__unused4);
0089     err |= put_user(0, &statbuf->__unused5);
0090 
0091     return err;
0092 }
0093 
0094 COMPAT_SYSCALL_DEFINE2(stat64, const char __user *, filename,
0095         struct compat_stat64 __user *, statbuf)
0096 {
0097     struct kstat stat;
0098     int error = vfs_stat(filename, &stat);
0099 
0100     if (!error)
0101         error = cp_compat_stat64(&stat, statbuf);
0102     return error;
0103 }
0104 
0105 COMPAT_SYSCALL_DEFINE2(lstat64, const char __user *, filename,
0106         struct compat_stat64 __user *, statbuf)
0107 {
0108     struct kstat stat;
0109     int error = vfs_lstat(filename, &stat);
0110 
0111     if (!error)
0112         error = cp_compat_stat64(&stat, statbuf);
0113     return error;
0114 }
0115 
0116 COMPAT_SYSCALL_DEFINE2(fstat64, unsigned int, fd,
0117         struct compat_stat64 __user *, statbuf)
0118 {
0119     struct kstat stat;
0120     int error = vfs_fstat(fd, &stat);
0121 
0122     if (!error)
0123         error = cp_compat_stat64(&stat, statbuf);
0124     return error;
0125 }
0126 
0127 COMPAT_SYSCALL_DEFINE4(fstatat64, unsigned int, dfd,
0128         const char __user *, filename,
0129         struct compat_stat64 __user *, statbuf, int, flag)
0130 {
0131     struct kstat stat;
0132     int error;
0133 
0134     error = vfs_fstatat(dfd, filename, &stat, flag);
0135     if (error)
0136         return error;
0137     return cp_compat_stat64(&stat, statbuf);
0138 }
0139 
0140 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
0141             struct compat_old_sigaction __user *,act,
0142             struct compat_old_sigaction __user *,oact)
0143 {
0144     WARN_ON_ONCE(sig >= 0);
0145     return compat_sys_sigaction(-sig, act, oact);
0146 }
0147 
0148 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
0149             struct compat_sigaction __user *,act,
0150             struct compat_sigaction __user *,oact,
0151             void __user *,restorer,
0152             compat_size_t,sigsetsize)
0153 {
0154         struct k_sigaction new_ka, old_ka;
0155         int ret;
0156 
0157         /* XXX: Don't preclude handling different sized sigset_t's.  */
0158         if (sigsetsize != sizeof(compat_sigset_t))
0159                 return -EINVAL;
0160 
0161         if (act) {
0162         u32 u_handler, u_restorer;
0163 
0164         new_ka.ka_restorer = restorer;
0165         ret = get_user(u_handler, &act->sa_handler);
0166         new_ka.sa.sa_handler =  compat_ptr(u_handler);
0167         ret |= get_compat_sigset(&new_ka.sa.sa_mask, &act->sa_mask);
0168         ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
0169         ret |= get_user(u_restorer, &act->sa_restorer);
0170         new_ka.sa.sa_restorer = compat_ptr(u_restorer);
0171                 if (ret)
0172                     return -EFAULT;
0173     }
0174 
0175     ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
0176 
0177     if (!ret && oact) {
0178         ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
0179         ret |= put_compat_sigset(&oact->sa_mask, &old_ka.sa.sa_mask,
0180                      sizeof(oact->sa_mask));
0181         ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
0182         ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
0183         if (ret)
0184             ret = -EFAULT;
0185         }
0186 
0187         return ret;
0188 }
0189 
0190 COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, ubuf,
0191             compat_size_t, count, u32, poshi, u32, poslo)
0192 {
0193     return ksys_pread64(fd, ubuf, count, ((u64)poshi << 32) | poslo);
0194 }
0195 
0196 COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, char __user *, ubuf,
0197             compat_size_t, count, u32, poshi, u32, poslo)
0198 {
0199     return ksys_pwrite64(fd, ubuf, count, ((u64)poshi << 32) | poslo);
0200 }
0201 
0202 COMPAT_SYSCALL_DEFINE4(readahead, int, fd, u32, offhi, u32, offlo,
0203              compat_size_t, count)
0204 {
0205     return ksys_readahead(fd, ((u64)offhi << 32) | offlo, count);
0206 }
0207 
0208 COMPAT_SYSCALL_DEFINE5(fadvise64, int, fd, u32, offhi, u32, offlo,
0209               compat_size_t, len, int, advice)
0210 {
0211     return ksys_fadvise64_64(fd, ((u64)offhi << 32) | offlo, len, advice);
0212 }
0213 
0214 COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, u32, offhi, u32, offlo,
0215                  u32, lenhi, u32, lenlo, int, advice)
0216 {
0217     return ksys_fadvise64_64(fd,
0218                  ((u64)offhi << 32) | offlo,
0219                  ((u64)lenhi << 32) | lenlo,
0220                  advice);
0221 }
0222 
0223 COMPAT_SYSCALL_DEFINE6(sync_file_range, unsigned int, fd, u32, off_high, u32, off_low,
0224             u32, nb_high, u32, nb_low, unsigned int, flags)
0225 {
0226     return ksys_sync_file_range(fd,
0227                     ((u64)off_high << 32) | off_low,
0228                     ((u64)nb_high << 32) | nb_low,
0229                     flags);
0230 }
0231 
0232 COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, u32, offhi, u32, offlo,
0233                      u32, lenhi, u32, lenlo)
0234 {
0235     return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
0236                   ((loff_t)lenhi << 32) | lenlo);
0237 }
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